Merge tag 'meson-clk-headers-for-v4.16-2' of git://github.com/BayLibre/clk-meson into v4.16/dt64

Add axg compatible string and device tree bindings

* tag 'meson-clk-headers-for-v4.16-2' of git://github.com/BayLibre/clk-meson:
  clk: meson-axg: add clocks dt-bindings required header
  dt-bindings: clock: add compatible variant for the Meson-AXG